Update git submodules

* Update docs/submodules/clover from branch 'master'
  - Merge "Remove unused argument"
  - Remove unused argument

    `BRANCH` is no longer required since we copy source code from working directory
    instead of remote git repository.

    Change-Id: I44776538a9efbca72e8d165e7790603cdafbe395
    Signed-off-by: Yujun Zhang <zhang.yujunz@zte.com.cn>

diff --git a/docs/submodules/clover b/docs/submodules/clover
index a1d8f68..867c430 160000 (submodule)
--- a/docs/submodules/clover
+++ b/docs/submodules/clover
@@ -1 +1 @@
-Subproject commit a1d8f683f31fa8277dd21749c05eec527f31d93e
+Subproject commit 867c4309a10df56eeb5098a78956e5d6951b8ba4